| Achievement | How to unlock
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|---|
| 5x5x5 | Getting five different posters each up to their maximum multiplier number.
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| Bloody Mess | Cause an enemy to slip in a pool of blood.
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| Five By Five | Getting all five of the multiplier of a single poster.
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| Flawless Ghost Busting | Defeat an enemy ghost without getting hit.
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| Janitorial Massacre | Kill 10 janitors.
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| Mad Crazy Skill | Defeat one of every enemy without getting hit (except for bosses).
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| Musical Interlude | Play the piano.
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| Next Level Brain Monster | Reach the level cap.
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| Ninja Twisty | Five sneak attack bite 'n shake deaths.
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| Platforming | Get a poster that requires you to jump onto another object or surface.
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| Riding Off Into The Sunrise | Beating the game.
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| Sick Three Way | Get one of your minions, a human enemy and an evil ghost to all fight each other simultaneously.
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| Steam Achieved | Achieving steam by opening up the steam pipe.
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| Watery Grave | Killing an enemy in the water.
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